dsp56001 Freescale Semiconductor, Inc, dsp56001 Datasheet - Page 9

• Manufacturer Part Number: dsp56001
• Description: Available In An 88 Pin Ceramic Through-hole Package.
• Manufacturer: Freescale Semiconductor, Inc

DSP56001
AC Electrical Characteristics
The timing waveforms in the AC Electrical Characteristics are tested with a V
all pins, except EXTAL, RESET, MODA, and MODB. These four pins are tested using the input levels set forth in the DC Electrical
Characteristics. AC timing specifications which are referenced to a device input signal are measured in production with respect to the
50% point of the respective input signal’s transition. DSP56001 output levels are measured with the production test machine V
V
AC Electrical Characteristics - Clock Operation
The DSP56001 system clock may be derived from the on-chip crystal oscillator as shown in Clock Figure 1, or it may be externally
supplied. An externally supplied square wave voltage source should be connected to EXTAL, leaving XTAL physically unconnected
(see Clock Figure 2) to the board or socket. The rise and fall time of this external clock should be 5 ns maximum.
Num
OH
1
2
3
4
reference levels set at 0.8 V and 2.0 V respectively.
Frequency of Operation (EXTAL Pin)
External Clock Input High (tch) —
EXTAL Pin
External Clock Input Low (tcl) —
EXTAL Pin
Clock Cycle Time = cyc = 2T
Instruction Cycle Time = Icyc = 4T
Notes:
1. External Clock Input High and External Clock Input Low are measured at 50% of the
2. T = Icyc / 4 is used in the electrical characteristics. T represents an average which is
independent of the duty cycle.
input transition. tch and tcl are dependent on the duty cycle.
Characteristics
(see Note 1 and 2)
(see Note 1 and 2)
DSP56001 Electrical Characteristics
48.75
Min
97.5
4.0
22
22
20.5 MHz
Max
20.5
150
150
250
500
IL
Min
4.0
17
17
37
74
maximum of 0.5 V and a V
27 MHz
Max
27.0
150
150
250
500
30.33
Min
13.5
13.5
4.0
60
33 MHz
IH
minimum of 2.4 V for
MOTOROLA
Max
33.0
150
150
250
500
OL
Unit
MHz
ns
ns
ns
ns
and
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